
This breadboard had me banging my head against the wall for months. Although the Keil IDE warned me that the board wasn't genuine, I ignored it, hoping it would still work. The GPIO seemed to be working fine so I was sure there would be no problems. When working with UART communication I got a constant interrupt on all ports. The same thing happened on another board in this lot. After using the original STM32 board, the problem disappeared.

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